No Effect of New Zealand Blackcurrant Extract on Recovery of Muscle Damage Following Running a Half-Marathon

Costello, Rianne, Willems, Mark E. T., Myers, Stephen D., Myers, Fiona, Lewis, Nathan A., Lee, B. J. and Blacker, Sam D. (2020) No Effect of New Zealand Blackcurrant Extract on Recovery of Muscle Damage Following Running a Half-Marathon. International Journal of Sport Nutrition & Exercise Metabolism. ISSN 1526-484X (In Press)

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Abstract

New Zealand blackcurrant (NZBC) contains anthocyanins, known to moderate blood flow and display anti-inflammatory properties that may improve recovery from exercise-induced muscle damage (EIMD). We examined whether NZBC extract supplementation enhances recovery from EIMD after a half-marathon race. Following a randomized, double-blind, independent groups design, 20 (8 women) recreational runners (age 30 ± 6 years, height 1.73 ± 0.74 m, body mass 68.5 ± 7.8 kg, half-marathon finishing time 1:56:33 ± 0:18:08 h:min:s) ingested either two 300 mg·day-1 capsules of NZBC extract (CurraNZ™) or a visually matched placebo (PLA), for 7-days prior to and 2-days following a half-marathon. Countermovement jump (CMJ) performance variables, urine interleukin-6 (IL-6), perceived muscle soreness and fatigue were measured pre-, post-, and at 24 h and 48 h after the half-marathon and analysed using a mixed linear model with statistical significance set a priori at P<0.05. The CMJ performance variables were reduced immediately post-half-marathon (P<0.05) with all returning to pre half-marathon by 48 h levels except concentric and eccentric peak force and eccentric duration, with no difference in response between groups (P>0.05). Urine IL-6 increased 48 h post-half-marathon in the NZBC group only (P<0.01) and remained unchanged compared to pre half-marathon levels in PLA group (P>0.05). Perceived muscle soreness and fatigue increased immediately post-half-marathon (P<0.01) and returned to pre half-marathon by 48 h, with no difference between groups (P>0.05). Supplementation with NZBC extract had no effect on the recovery of countermovement jump variables and perceptions of muscle soreness or fatigue following a half-marathon in recreational runners.

Item Type: Article
Uncontrolled Keywords: Anthocyanins, endurance exercise, inflammation, supplementation
Subjects: Q Science > Q Science (General)
Q Science > QP Physiology
Divisions: Departments > Sport and Exercise Sciences
Depositing User: Sam Blacker
Date Deposited: 01 Jun 2020 10:03
Last Modified: 01 Jun 2020 10:03
URI: http://eprints.chi.ac.uk/id/eprint/5185

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